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Farmall & IHC Tractors Discussion Forum
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Zenith carburetor

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Avery

12-18-2006 05:44:10




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Sometimes caburetor on tractor will clog and resrict gas flow. Though not to often. Have screen in sediment bowl. Which try to clean out whenever it looks like it needs it. Took carburetor of last time cleaned with compressed air it worked good. Never claimed to be much of a mechanic but was wondering? Instead of taking carburetor off and apart could I have shut off fuel. Unhooked fuel line and blew compressed air directly into carburetor and would this have maybe helped and possible saved some time. Or would this cause problem with the carburetor. Thanks

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Avery

12-18-2006 08:47:11




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 Re: Zenith carburetor in reply to Avery, 12-18-2006 05:44:10  
It's a 140 and has the adjusting screw to adjust the idle of tractor. Did you say you sprayed carburetor cleaner in the elbow where pre cleaner screen is? Thanks.



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old

12-18-2006 08:39:18




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 Re: Zenith carburetor in reply to Avery, 12-18-2006 05:44:10  
Is it one with a nonadjustable main jet?? What tractor?? If its one with the nonadjustable main jet then heres how I do it when I have the problem. I pull the drain plug and also the man jet cap. Then I spray carb cleaner into the main jet and with haveing the drain plug out the dirt is flushed out the bottom of the carb and all is well again till it clogs again. Useing compressed air in the fuel line area can cause a lot of problems packing the junk and also may hurt the float and of float needle. If its a rubber tipped needle it could even blow the tip right off

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Dave BN

12-18-2006 07:40:38




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 Re: Zenith carburetor in reply to Avery, 12-18-2006 05:44:10  
Avery, you didn't say which modle tractor you have, that might help. You probibly have a screen at the input of the carburetor. What looks like an elbow is actually a screen and is available from Case/IH dealer. If this is bad it could be your problem. I wouldn't blow into the carburetor, but maybe suck gently some way(remember your dealing with gasoline so dont use a shop vac) and/or wipe out with a Q-top wetted with alcohol. You shouldn't have to clean the screen in the sediment ever. Surely not more than every 10 years. If you do then you have a problem you need to fix. I found a tank full of sand recently causing me grief. Suspect this was left over from sandblasting. I put a gallon or two of water in the tank and rocked the tractor back and forth as hard as I could by hand to get the water to slosh around behind the baffle(On my BN) in the tank. I did this several times then dried it out and filled with gas and dry gas. That solved my problem. My tank was shiny inside, If you have rust you'll need to deal with that a different way. Dave.

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glennster

12-18-2006 05:55:34




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 Re: Zenith carburetor in reply to Avery, 12-18-2006 05:44:10  
i would be a little nervous blowing compressed air into the fuel line of a carb. you may damage the float or drive dirt into passageways and then iit wont be easy to clean. sounds like you got fine sediment in the fuel tank, maybe rust. could also be your fuel storage tank is dirty so your getting less than clean fuel from your supplier. if the tractor tank is rusty, you could pull the tank and have it lined. a quick fix would be to your local napa auto parts, take your old fuel line with you. get 2 brass barb fittings , one for the sediment bowl and one for the carb. get either a 3031 or 3032 filter. they are small metal cannister filters, full flow for a gravity system. 3031 is for 1/4 inch lines, 3032 is for 5/16 fuel lines. they come with 2 hoses and 4 clamps. make up a rubber line with the filter in it. you can cut the origional line and splice it in, but if you are concerned with origionality, hang the old line on the workbench, and go with the rubber line.

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